One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,15)(12,16)(13,14)(17,18)(19,26)(20,29)(21,24)(22,27)(23,25)(28,31)(30,32) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(17,19,21,28,23,30,22,29)(18,20,27,32,25,31,24,26)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,20,21,32,23,31,22,26)(18,19,27,28,25,30,24,29)(9,11,13,12)(10,15,14,16)(17,18)(19,20)(21,27)(22,24)(23,25)(26,29)(28,32)(30,31)(1,4,5,3)(2,6,8,7)(9,12,13,11)(10,15,14,16)(17,21,23,22)(18,24,25,27)(19,28,30,29)(20,26,31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.